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Commit 984bb9bb authored by Alan Stern's avatar Alan Stern Committed by Ben Hutchings
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USB: ene_usb6250: fix DMA to the stack 

commit 628c2893 upstream.

The ene_usb6250 sub-driver in usb-storage does USB I/O to buffers on
the stack, which doesn't work with vmapped stacks.  This patch fixes
the problem by allocating a separate 512-byte buffer at probe time and
using it for all of the offending I/O operations.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: default avatarAndreas Hartmann <andihartmann@01019freenet.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 9b187301
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Showing with 55 additions and 35 deletions
drivers/usb/storage/ene_ub6250.c
View file @ 984bb9bb
......@@ -443,6 +443,10 @@ struct ms_lib_ctrl {
#define SD_BLOCK_LEN 9
struct ene_ub6250_info {
/* I/O bounce buffer */
u8 *bbuf;
/* for 6250 code */
struct SD_STATUS SD_Status;
struct MS_STATUS MS_Status;
......@@ -490,8 +494,11 @@ static int ene_load_bincode(struct us_data *us, unsigned char flag);
static void ene_ub6250_info_destructor(void *extra)
{
struct ene_ub6250_info *info = (struct ene_ub6250_info *) extra;
if (!extra)
return;
kfree(info->bbuf);
}
static int ene_send_scsi_cmd(struct us_data *us, u8 fDir, void *buf, int use_sg)
......@@ -855,8 +862,9 @@ static int ms_read_readpage(struct us_data *us, u32 PhyBlockAddr,
u8 PageNum, u32 *PageBuf, struct ms_lib_type_extdat *ExtraDat)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
u8 *bbuf = info->bbuf;
int result;
u8 ExtBuf[4];
u32 bn = PhyBlockAddr * 0x20 + PageNum;
/* printk(KERN_INFO "MS --- MS_ReaderReadPage,
......@@ -899,7 +907,7 @@ static int ms_read_readpage(struct us_data *us, u32 PhyBlockAddr,
bcb->CDB[2] = (unsigned char)(PhyBlockAddr>>16);
bcb->CDB[6] = 0x01;
result = ene_send_scsi_cmd(us, FDIR_READ, &ExtBuf, 0);
result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
......@@ -908,9 +916,9 @@ static int ms_read_readpage(struct us_data *us, u32 PhyBlockAddr,
ExtraDat->status0 = 0x10; /* Not yet,fireware support */
ExtraDat->status1 = 0x00; /* Not yet,fireware support */
ExtraDat->ovrflg = ExtBuf[0];
ExtraDat->mngflg = ExtBuf[1];
ExtraDat->logadr = memstick_logaddr(ExtBuf[2], ExtBuf[3]);
ExtraDat->ovrflg = bbuf[0];
ExtraDat->mngflg = bbuf[1];
ExtraDat->logadr = memstick_logaddr(bbuf[2], bbuf[3]);
return USB_STOR_TRANSPORT_GOOD;
}
......@@ -1336,8 +1344,9 @@ static int ms_lib_read_extra(struct us_data *us, u32 PhyBlock,
u8 PageNum, struct ms_lib_type_extdat *ExtraDat)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
u8 *bbuf = info->bbuf;
int result;
u8 ExtBuf[4];
/* printk("MS_LibReadExtra --- PhyBlock = %x, PageNum = %x\n", PhyBlock, PageNum); */
memset(bcb, 0, sizeof(struct bulk_cb_wrap));
......@@ -1352,7 +1361,7 @@ static int ms_lib_read_extra(struct us_data *us, u32 PhyBlock,
bcb->CDB[2] = (unsigned char)(PhyBlock>>16);
bcb->CDB[6] = 0x01;
result = ene_send_scsi_cmd(us, FDIR_READ, &ExtBuf, 0);
result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
......@@ -1360,9 +1369,9 @@ static int ms_lib_read_extra(struct us_data *us, u32 PhyBlock,
ExtraDat->intr = 0x80; /* Not yet, waiting for fireware support */
ExtraDat->status0 = 0x10; /* Not yet, waiting for fireware support */
ExtraDat->status1 = 0x00; /* Not yet, waiting for fireware support */
ExtraDat->ovrflg = ExtBuf[0];
ExtraDat->mngflg = ExtBuf[1];
ExtraDat->logadr = memstick_logaddr(ExtBuf[2], ExtBuf[3]);
ExtraDat->ovrflg = bbuf[0];
ExtraDat->mngflg = bbuf[1];
ExtraDat->logadr = memstick_logaddr(bbuf[2], bbuf[3]);
return USB_STOR_TRANSPORT_GOOD;
}
......@@ -1566,9 +1575,9 @@ static int ms_lib_scan_logicalblocknumber(struct us_data *us, u16 btBlk1st)
u16 PhyBlock, newblk, i;
u16 LogStart, LogEnde;
struct ms_lib_type_extdat extdat;
u8 buf[0x200];
u32 count = 0, index = 0;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
u8 *bbuf = info->bbuf;
for (PhyBlock = 0; PhyBlock < info->MS_Lib.NumberOfPhyBlock;) {
ms_lib_phy_to_log_range(PhyBlock, &LogStart, &LogEnde);
......@@ -1582,14 +1591,16 @@ static int ms_lib_scan_logicalblocknumber(struct us_data *us, u16 btBlk1st)
}
if (count == PhyBlock) {
ms_lib_read_extrablock(us, PhyBlock, 0, 0x80, &buf);
ms_lib_read_extrablock(us, PhyBlock, 0, 0x80,
bbuf);
count += 0x80;
}
index = (PhyBlock % 0x80) * 4;
extdat.ovrflg = buf[index];
extdat.mngflg = buf[index+1];
extdat.logadr = memstick_logaddr(buf[index+2], buf[index+3]);
extdat.ovrflg = bbuf[index];
extdat.mngflg = bbuf[index+1];
extdat.logadr = memstick_logaddr(bbuf[index+2],
bbuf[index+3]);
if ((extdat.ovrflg & MS_REG_OVR_BKST) != MS_REG_OVR_BKST_OK) {
ms_lib_setacquired_errorblock(us, PhyBlock);
......@@ -2072,9 +2083,9 @@ static int ene_ms_init(struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
int result;
u8 buf[0x200];
u16 MSP_BlockSize, MSP_UserAreaBlocks;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
u8 *bbuf = info->bbuf;
printk(KERN_INFO "transport --- ENE_MSInit\n");
......@@ -2093,13 +2104,13 @@ static int ene_ms_init(struct us_data *us)
bcb->CDB[0] = 0xF1;
bcb->CDB[1] = 0x01;
result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD) {
printk(KERN_ERR "Execution MS Init Code Fail !!\n");
return USB_STOR_TRANSPORT_ERROR;
}
/* the same part to test ENE */
info->MS_Status = *(struct MS_STATUS *)&buf[0];
info->MS_Status = *(struct MS_STATUS *) bbuf;
if (info->MS_Status.Insert && info->MS_Status.Ready) {
printk(KERN_INFO "Insert = %x\n", info->MS_Status.Insert);
......@@ -2108,15 +2119,15 @@ static int ene_ms_init(struct us_data *us)
printk(KERN_INFO "IsMSPHG = %x\n", info->MS_Status.IsMSPHG);
printk(KERN_INFO "WtP= %x\n", info->MS_Status.WtP);
if (info->MS_Status.IsMSPro) {
MSP_BlockSize = (buf[6] << 8) | buf[7];
MSP_UserAreaBlocks = (buf[10] << 8) | buf[11];
MSP_BlockSize = (bbuf[6] << 8) | bbuf[7];
MSP_UserAreaBlocks = (bbuf[10] << 8) | bbuf[11];
info->MSP_TotalBlock = MSP_BlockSize * MSP_UserAreaBlocks;
} else {
ms_card_init(us); /* Card is MS (to ms.c)*/
}
usb_stor_dbg(us, "MS Init Code OK !!\n");
} else {
usb_stor_dbg(us, "MS Card Not Ready --- %x\n", buf[0]);
usb_stor_dbg(us, "MS Card Not Ready --- %x\n", bbuf[0]);
return USB_STOR_TRANSPORT_ERROR;
}
......@@ -2126,9 +2137,9 @@ static int ene_ms_init(struct us_data *us)
static int ene_sd_init(struct us_data *us)
{
int result;
u8 buf[0x200];
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
u8 *bbuf = info->bbuf;
usb_stor_dbg(us, "transport --- ENE_SDInit\n");
/* SD Init Part-1 */
......@@ -2162,17 +2173,17 @@ static int ene_sd_init(struct us_data *us)
bcb->Flags = US_BULK_FLAG_IN;
bcb->CDB[0] = 0xF1;
result = ene_send_scsi_cmd(us, FDIR_READ, &buf, 0);
result = ene_send_scsi_cmd(us, FDIR_READ, bbuf, 0);
if (result != USB_STOR_XFER_GOOD) {
usb_stor_dbg(us, "Execution SD Init Code Fail !!\n");
return USB_STOR_TRANSPORT_ERROR;
}
info->SD_Status = *(struct SD_STATUS *)&buf[0];
info->SD_Status = *(struct SD_STATUS *) bbuf;
if (info->SD_Status.Insert && info->SD_Status.Ready) {
struct SD_STATUS *s = &info->SD_Status;
ene_get_card_status(us, (unsigned char *)&buf);
ene_get_card_status(us, bbuf);
usb_stor_dbg(us, "Insert = %x\n", s->Insert);
usb_stor_dbg(us, "Ready = %x\n", s->Ready);
usb_stor_dbg(us, "IsMMC = %x\n", s->IsMMC);
......@@ -2180,7 +2191,7 @@ static int ene_sd_init(struct us_data *us)
usb_stor_dbg(us, "HiSpeed = %x\n", s->HiSpeed);
usb_stor_dbg(us, "WtP = %x\n", s->WtP);
} else {
usb_stor_dbg(us, "SD Card Not Ready --- %x\n", buf[0]);
usb_stor_dbg(us, "SD Card Not Ready --- %x\n", bbuf[0]);
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_GOOD;
......@@ -2190,13 +2201,15 @@ static int ene_sd_init(struct us_data *us)
static int ene_init(struct us_data *us)
{
int result;
u8 misc_reg03 = 0;
u8 misc_reg03;
struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);
u8 *bbuf = info->bbuf;
result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
result = ene_get_card_type(us, REG_CARD_STATUS, bbuf);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
misc_reg03 = bbuf[0];
if (misc_reg03 & 0x01) {
if (!info->SD_Status.Ready) {
result = ene_sd_init(us);
......@@ -2312,8 +2325,9 @@ static int ene_ub6250_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int result;
u8 misc_reg03 = 0;
u8 misc_reg03;
struct us_data *us;
struct ene_ub6250_info *info;
result = usb_stor_probe1(&us, intf, id,
(id - ene_ub6250_usb_ids) + ene_ub6250_unusual_dev_list);
......@@ -2321,11 +2335,16 @@ static int ene_ub6250_probe(struct usb_interface *intf,
return result;
/* FIXME: where should the code alloc extra buf ? */
if (!us->extra) {
us->extra = kzalloc(sizeof(struct ene_ub6250_info), GFP_KERNEL);
if (!us->extra)
return -ENOMEM;
us->extra_destructor = ene_ub6250_info_destructor;
info = (struct ene_ub6250_info *)(us->extra);
info->bbuf = kmalloc(512, GFP_KERNEL);
if (!info->bbuf) {
kfree(us->extra);
return -ENOMEM;
}
us->transport_name = "ene_ub6250";
......@@ -2337,12 +2356,13 @@ static int ene_ub6250_probe(struct usb_interface *intf,
return result;
/* probe card type */
result = ene_get_card_type(us, REG_CARD_STATUS, &misc_reg03);
result = ene_get_card_type(us, REG_CARD_STATUS, info->bbuf);
if (result != USB_STOR_XFER_GOOD) {
usb_stor_disconnect(intf);
return USB_STOR_TRANSPORT_ERROR;
}
misc_reg03 = info->bbuf[0];
if (!(misc_reg03 & 0x01)) {
pr_info("ums_eneub6250: The driver only supports SD/MS card. "
"To use SM card, please build driver/staging/keucr\n");
......
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