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scsi: aacraid: Do not wait for outstanding write commands on synchronize_cache

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There is no need to wait for outstanding write commands on synchronize
cache; the block layer is responsible for I/O scheduling, no need to
out-guess it in the driver layer.

Link: https://lore.kernel.org/r/20200228075318.91255-5-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P <balsundar.b@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2020-02-28 08:53:09 +01:00 committed by Martin K. Petersen
parent 84ff9532e5
commit 2c644b1d70
1 changed files with 2 additions and 74 deletions
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76
drivers/scsi/aacraid/aachba.c
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@ -2601,9 +2601,7 @@ static int aac_write(struct scsi_cmnd * scsicmd)
static void synchronize_callback(void *context, struct fib *fibptr)
{
struct aac_synchronize_reply *synchronizereply;
struct scsi_cmnd *cmd;
cmd = context;
struct scsi_cmnd *cmd = context;
if (!aac_valid_context(cmd, fibptr))
return;
@ -2644,77 +2642,8 @@ static int aac_synchronize(struct scsi_cmnd *scsicmd)
int status;
struct fib *cmd_fibcontext;
struct aac_synchronize *synchronizecmd;
struct scsi_cmnd *cmd;
struct scsi_device *sdev = scsicmd->device;
int active = 0;
struct aac_dev *aac;
u64 lba = ((u64)scsicmd->cmnd[2] << 24) | (scsicmd->cmnd[3] << 16) |
(scsicmd->cmnd[4] << 8) | scsicmd->cmnd[5];
u32 count = (scsicmd->cmnd[7] << 8) | scsicmd->cmnd[8];
unsigned long flags;
/*
* Wait for all outstanding queued commands to complete to this
* specific target (block).
*/
spin_lock_irqsave(&sdev->list_lock, flags);
list_for_each_entry(cmd, &sdev->cmd_list, list)
if (cmd->SCp.phase == AAC_OWNER_FIRMWARE) {
u64 cmnd_lba;
u32 cmnd_count;
if (cmd->cmnd[0] == WRITE_6) {
cmnd_lba = ((cmd->cmnd[1] & 0x1F) << 16) |
(cmd->cmnd[2] << 8) |
cmd->cmnd[3];
cmnd_count = cmd->cmnd[4];
if (cmnd_count == 0)
cmnd_count = 256;
} else if (cmd->cmnd[0] == WRITE_16) {
cmnd_lba = ((u64)cmd->cmnd[2] << 56) |
((u64)cmd->cmnd[3] << 48) |
((u64)cmd->cmnd[4] << 40) |
((u64)cmd->cmnd[5] << 32) |
((u64)cmd->cmnd[6] << 24) |
(cmd->cmnd[7] << 16) |
(cmd->cmnd[8] << 8) |
cmd->cmnd[9];
cmnd_count = (cmd->cmnd[10] << 24) |
(cmd->cmnd[11] << 16) |
(cmd->cmnd[12] << 8) |
cmd->cmnd[13];
} else if (cmd->cmnd[0] == WRITE_12) {
cmnd_lba = ((u64)cmd->cmnd[2] << 24) |
(cmd->cmnd[3] << 16) |
(cmd->cmnd[4] << 8) |
cmd->cmnd[5];
cmnd_count = (cmd->cmnd[6] << 24) |
(cmd->cmnd[7] << 16) |
(cmd->cmnd[8] << 8) |
cmd->cmnd[9];
} else if (cmd->cmnd[0] == WRITE_10) {
cmnd_lba = ((u64)cmd->cmnd[2] << 24) |
(cmd->cmnd[3] << 16) |
(cmd->cmnd[4] << 8) |
cmd->cmnd[5];
cmnd_count = (cmd->cmnd[7] << 8) |
cmd->cmnd[8];
} else
continue;
if (((cmnd_lba + cmnd_count) < lba) ||
(count && ((lba + count) < cmnd_lba)))
continue;
++active;
break;
}
spin_unlock_irqrestore(&sdev->list_lock, flags);
/*
* Yield the processor (requeue for later)
*/
if (active)
return SCSI_MLQUEUE_DEVICE_BUSY;
aac = (struct aac_dev *)sdev->host->hostdata;
if (aac->in_reset)
@ -2723,8 +2652,7 @@ static int aac_synchronize(struct scsi_cmnd *scsicmd)
/*
* Allocate and initialize a Fib
*/
if (!(cmd_fibcontext = aac_fib_alloc(aac)))
return SCSI_MLQUEUE_HOST_BUSY;
cmd_fibcontext = aac_fib_alloc_tag(aac, scsicmd);
aac_fib_init(cmd_fibcontext);