Commit 94088a7a authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Jeff Garzik

[PATCH] remove ide_cmd_type_parser() logic

Set ide_task_t fields (command_type, handler and prehandler) directly.
Remove unused ide_task_t->posthandler and all ide_cmd_type_parser() logic.

ide_cmd_type_parser() was meant to be used for ioctls but
ended up checking validity of kernel generated requests (doh!).

Rationale for removal:
- it can't be used for existing ioctls (changes the way they work)
- kernel shouldn't check validity of (root only) user-space requests
  (it can and should be done in user-space)
- it wastes CPU cycles on going through parsers
- it makes code harder to understand/follow
  (now info about request is localized)
parent 890abeb9
This diff is collapsed.
This diff is collapsed.
......@@ -483,7 +483,7 @@ static int ide_tcq_check_autopoll(ide_drive_t *drive)
args->tfRegister[IDE_FEATURE_OFFSET] = 0x01;
args->tfRegister[IDE_COMMAND_OFFSET] = WIN_NOP;
args->command_type = ide_cmd_type_parser(args);
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = ide_tcq_nop_handler;
return ide_raw_taskfile(drive, args, NULL);
}
......@@ -513,7 +513,8 @@ static int ide_tcq_configure(ide_drive_t *drive)
memset(args, 0, sizeof(ide_task_t));
args->tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
args->tfRegister[IDE_FEATURE_OFFSET] = SETFEATURES_EN_WCACHE;
args->command_type = ide_cmd_type_parser(args);
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = &task_no_data_intr;
if (ide_raw_taskfile(drive, args, NULL)) {
printk(KERN_WARNING "%s: failed to enable write cache\n", drive->name);
......@@ -527,7 +528,8 @@ static int ide_tcq_configure(ide_drive_t *drive)
memset(args, 0, sizeof(ide_task_t));
args->tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
args->tfRegister[IDE_FEATURE_OFFSET] = SETFEATURES_DIS_RI;
args->command_type = ide_cmd_type_parser(args);
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = &task_no_data_intr;
if (ide_raw_taskfile(drive, args, NULL)) {
printk(KERN_ERR "%s: disabling release interrupt fail\n", drive->name);
......@@ -541,7 +543,8 @@ static int ide_tcq_configure(ide_drive_t *drive)
memset(args, 0, sizeof(ide_task_t));
args->tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
args->tfRegister[IDE_FEATURE_OFFSET] = SETFEATURES_EN_SI;
args->command_type = ide_cmd_type_parser(args);
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = &task_no_data_intr;
if (ide_raw_taskfile(drive, args, NULL)) {
printk(KERN_ERR "%s: enabling service interrupt fail\n", drive->name);
......
......@@ -814,11 +814,10 @@ static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq,
memcpy(args.tfRegister, &taskfile, sizeof(struct hd_drive_task_hdr));
memset(args.hobRegister, 0, sizeof(struct hd_drive_hob_hdr));
/* We can't call ide_cmd_type_parser here, since it won't understand
our command, but that doesn't matter, since we don't use the
generic interrupt handlers either. Setup the bits of args that we
do need.
*/
/*
* Setup the bits of args that we do need.
* Note that we don't use the generic interrupt handlers.
*/
args.handler = NULL;
args.rq = (struct request *) rq;
rq->special = (ide_task_t *)&args;
......
......@@ -998,7 +998,6 @@ typedef struct hwif_s {
*/
typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
typedef ide_startstop_t (ide_post_handler_t)(ide_drive_t *);
typedef int (ide_expiry_t)(ide_drive_t *);
typedef struct hwgroup_s {
......@@ -1360,7 +1359,6 @@ typedef struct ide_task_s {
int command_type;
ide_pre_handler_t *prehandler;
ide_handler_t *handler;
ide_post_handler_t *posthandler;
struct request *rq; /* copy of request */
void *special; /* valid_t generally */
} ide_task_t;
......@@ -1459,15 +1457,6 @@ extern void ide_init_drive_taskfile(struct request *);
extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
extern ide_pre_handler_t * ide_pre_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
extern ide_handler_t * ide_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
extern ide_post_handler_t * ide_post_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
/* Expects args is a full set of TF registers and parses the command type */
extern int ide_cmd_type_parser(ide_task_t *);
int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
......
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