- 06 Feb, 2008 40 commits
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Julia Lawall authored
The functions of_find_compatible_node and of_find_node_by_type both call of_node_get on their result. So any error handling code thereafter should call of_node_put(np). This is taken care of in the case where there is a goto out, but not when there is a direct return. The function irq_alloc_host puts np into the returned structure, which is stored in the global variable mpc8xx_pic_host, so the reference count should be set for the lifetime of that variable. The current solution ups the reference count again in the argument to irq_alloc_host so that it can be decremented on the way out. This seems a bit unnecessary, and also doesn't work in the case where irq_alloc_host fails, because then the reference count only goes does by one, whereas it should go down by two. A better solution is to not increment the reference count in the argument to irq_alloc_host and only decrement it on the way out in an error case. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * E = \(of_get_parent\|of_find_compatible_node\)(...); if (E == NULL) S ... when != of_node_put(...,(T1)E,...) when != if (E != NULL) { ... of_node_put(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != of_node_put(...,(T2)E,...) when != if (E != NULL) { ... of_node_put(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Julia Lawall authored
Of_get_parent and of_find_compatible_node do an of_node_get, and thus a corresponding of_code_put is needed in the error case. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * E = \(of_get_parent\|of_find_compatible_node\)(...); if (E == NULL) S ... when != of_node_put(...,(T1)E,...) when != if (E != NULL) { ... of_node_put(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != of_node_put(...,(T2)E,...) when != if (E != NULL) { ... of_node_put(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by:
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Scott Wood authored
Currently, update_mmu_cache will crash if given a no-access PTE. There's no need to synchronize dcache/icache unless it's an exec mapping -- however, due to the existence of older glibc versions that execute out of a read-but-no-exec page, readability is tested instead. This assumes no exec-only mappings; if such mappings become supported, they will need to go through the kmap_atomic() version of dcache/icache synchronization. This fixes a bug reported by some users where the kernel would crash while dumping core on a threaded program. Signed-off-by:
Scott Wood <scottwood@freescale.com> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Michael Ellerman authored
The patch to legacy_serial.c (1a7507c7, Reduce code duplication in legacy_serial, add UART parent types) changed the semantics for opb ports from type = "opb" || compatible = "ibm,opb" to type = "opb" && compatible = "ibm,opb". The result is serial ports on our QS21s (Cell blades) don't get found, and for some reason the machine doesn't boot at all - possibly it's panicking due to lack of a console? The fix is to add two entries to the of_device_id table, one that looks for type = "opb" and the other compatible = "ibm,opb". Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Acked-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by:
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Tony Breeds authored
This ensures that the syscall and the (fast) vdso versions of clock_getres() will return the same resolution. Signed-off-by:
Tony Breeds <tony@bakeyournoodle.com> Signed-off-by:
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Stephen Rothwell authored
WARNING: drivers/cdrom/viocd.o(.text+0x504): Section mismatch in reference from the function .viocd_probe() to the function .init.text:.find_capability() Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Stephen Rothwell authored
WARNING: vmlinux.o(.text+0x3017c): Section mismatch in reference from the function .vio_create_viodasd() to the function .devinit.text:.vio_register_device_node() Signed-off-by:
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Stephen Rothwell authored
I got this warning from gcc: arch/powerpc/platforms/cell/axon_msi.c:118: warning: 'tmp' may be used uninitialized in this function Which turns out to be a false positive, but pointed out that it was possible for the error path in find_msi_translator() to do an extra of_node_put on a node. This fixes it by localising the ref counting a bit. As a side effect, the warning goes away. Signed-off-by:
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Michael Ellerman authored
There's a brown-paper-bag bug in axon_msi, we pass the address of our FIFO directly to the hardware, without DMA mapping it. This leads to DMA exceptions if you enable MSI & the IOMMU. The fix is to correctly DMA map the fifo, dma_alloc_coherent() does what we want - and we need to track the virt & phys addresses. Signed-off-by:
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Michael Ellerman authored
Now that we create of_platform devices earlier on cell, we can make the axon_msi driver an of_platform driver. This makes the code cleaner in several ways, and most importantly means we have a struct device. Signed-off-by:
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Michael Ellerman authored
Although of_platform_device's can have a shutdown routine, at the moment the bus code doesn't actually call it. So add the required glue to hook the shutdown routine. Signed-off-by:
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Michael Ellerman authored
Currently cell publishes OF devices at device_initcall() time, which means the earliest a driver can bind to a device is also device_initcall() time. We have a driver we want to register before other devices, so publish the devices at subsys_initcall() time. This should not cause any behaviour change for existing drivers, as they are still bound at device_initcall() time. Signed-off-by:
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Michael Ellerman authored
Iterating through a device node's parents is simple enough, but dealing with the refcounts properly is a little ugly, and replicating that logic is asking for someone to get it wrong or forget it all together, eg: while (dn != NULL) { /* loop body */ tmp = of_get_parent(dn); of_node_put(dn); dn = tmp; } So add of_get_next_parent(), inspired by of_get_next_child(). The contract is that it returns the parent and drops the reference on the current node, this makes the loop look like: while (dn != NULL) { /* loop body */ dn = of_get_next_parent(dn); } Signed-off-by:David S. Miller <davem@davemloft.net> Signed-off-by:
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Andre Detsch authored
Reference count for the "neighbor" spu context was not being correctly decremented after usage. So, contexts used as reference during SPU affinity setup were not being deallocated, leading to a memory leak. Signed-off-by:
Andre Detsch <adetsch@br.ibm.com> Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
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Jeremy Kerr authored
Currently we only catch debug events through the 0x3fff status; spufs_run_spu doesn't handle single-step SPE events. This change adds a handler for conditions where the SPE is stopped due to single-step-mode. Signed-off-by:
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Christoph Hellwig authored
This adds markers two important points in the spufs code and a new module (sputrace.ko) that allows reading these out through a proc file. Long-term I'd rather see something like lttng extended to use the spufs instrumentation, but for now I think this is a good enough quick solution. We'll probably want to add various addition event in addition to that ones I have already. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (29 commits) ide-tape: bump minor driver version ide-tape: cleanup the remaining codestyle issues ide-tape: fix syntax error in idetape_identify_device() ide-tape: remove leftover OnStream support warning ide-tape: collect module-related macro calls at the end ide-tape: include proper headers ide-tape: remove unused "length" arg from idetape_create_read_buffer_cmd() ide-tape: remove struct idetape_id_gcw ide-tape: cleanup and fix comments ide-tape: shorten some function names ide-tape: remove idetape_increase_max_pipeline_stages() ide-tape: struct idetape_tape_t: shorten member names v2 ide-tape: struct idetape_tape_t: remove unused members ide-tape: remove typedef idetape_chrdev_direction_t ide-tape: simplify code branching in the interrupt handler ide-tape: remove unreachable code chunk ide-tape: remove struct idetape_read_position_result_t ide-tape: refactor the debug logging facility ide: add ide_read_error() inline helper ide: add ide_read_[alt]status() inline helpers ...
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git://git.kernel.org/pub/scm/linux/kernel/git/willy/miscLinus Torvalds authored
* 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc: pool: Improve memory usage for devices which can't cross boundaries Change dmapool free block management dmapool: Tidy up includes and add comments dmapool: Validate parameters to dma_pool_create Avoid taking waitqueue lock in dmapool dmapool: Fix style problems Move dmapool.c to mm/ directory
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Borislav Petkov authored
Signed-off-by:
Borislav Petkov <petkovbb@gmail.com> Signed-off-by:
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
... thus decreasing checkpatch.pl errors to 0. Bart: - remove needless function prototypes while at it - remove needless parentheses while at it - add missing KERN_ level to ide_tape_probe() - other minor fixups Signed-off-by:
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Borislav Petkov authored
Spotted by Sergei Shtylyov. CC: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by:
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
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Borislav Petkov authored
Also, remove redundant ones and cleanup whitespace. Bart: - minor fixups Signed-off-by:
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Borislav Petkov authored
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Borislav Petkov authored
This function was being used only at one place so fold it in there. Signed-off-by:
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Borislav Petkov authored
Shorten some member names not too aggressively since this driver might be gone anyway soon. Bart: - minor fixes Signed-off-by:
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Borislav Petkov authored
- last_frame_position: only being written to once - firmware_revision, product_id, vendor_id: used once, remove from struct idetape_tape_t and deal with them locally - firmware_revision_num: only written to once - tape_still_time_begin: completely unused - tape_still_time: never written to; remove corresponding code chunk - uncontrolled_last_pipeline_head: only once written to - blocks_in_buffer: only written to Signed-off-by:
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Borislav Petkov authored
.. and replace it with plain enums. Signed-off-by:
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Borislav Petkov authored
... by adding a new typedef function pointer idetape_io_buf in order to call the proper buffer i/o handler depending on the data direction. Bart: - move idetape_io_buf before idetape_pc_intr() comment Signed-off-by:
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Borislav Petkov authored
tape->speed_control is set to 1 in idetape_setup(), but, in calculate_speeds() its value is tested for being 0, 1, or 2. Remove the if-branches where tape->speed_control != 1 since they are never executed. Also, rename calculate_speeds() by adding driver's prefix as is with the other function names. Signed-off-by:
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Borislav Petkov authored
There should be no functional changes resulting from this patch. Bart: - remove needless "!!" Signed-off-by:
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Borislav Petkov authored
Teach the debug logging macro to differentiate between log levels based on the type of debug level enabled specifically instead of a threshold-based one. Thus, convert tape->debug_level to a bitmask that is written to over /proc. Also, - cleanup and simplify the debug macro thus removing a lot of code lines, - get rid of unused debug levels, - adjust the loglevel at several places where it was simply missing (e.g. idetape_chrdev_open()) - move the tape ptr initialization up in idetape_chrdev_open() so that we can use it in the debug_log macro earlier in the function. Signed-off-by:
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Bartlomiej Zolnierkiewicz authored
Acked-by:
Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by:
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Bartlomiej Zolnierkiewicz authored
Acked-by:
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Bartlomiej Zolnierkiewicz authored
ide-cris.c: * Add cris_setup_ports() helper and use it instead of ide_setup_ports() (fixes random value being set in ->io_ports[IDE_IRQ_OFFSET]). buddha.c: * Add buddha_setup_ports() helper and use it instead of ide_setup_ports(). falconide.c: * Add falconide_setup_ports() helper and use it instead of ide_setup_ports(), also fix return value of falconide_init() while at it. gayle.c: * Add gayle_setup_ports() helper and use it instead of ide_setup_ports(). macide.c: * Add macide_setup_ports() helper and use it instead of ide_setup_ports() (fixes incorrect value being set in ->io_ports[IDE_IRQ_OFFSET]). q40ide.c: * Fix q40_ide_setup_ports() comments. ide.c: * Remove no longer needed ide_setup_ports(). Cc: Mikael Starvik <starvik@axis.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: -
Bartlomiej Zolnierkiewicz authored
Same BUG_ON() is present inside ide_set_handler(). Signed-off-by:
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