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[libata] wrap kmap_atomic(KM_IRQ0) with local_irq_save/restore() 

Interrupts must be disabled if using kmap_atomic(KM_IRQ0), but that was
not the case in a few code paths coming directly from ATA driver
interrupt handlers (which use spin_lock rather than spin_lock_irqsave).

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jeff Garzik 2008-02-29 19:10:51 -05:00
parent 931506d3b2
commit b445c56815
1 changed files with 10 additions and 0 deletions
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10
drivers/ata/libata-scsi.c
View File

@ -1694,12 +1694,17 @@ void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
u8 *rbuf;
unsigned int buflen, rc;
struct scsi_cmnd *cmd = args->cmd;
unsigned long flags;
local_irq_save(flags);
buflen = ata_scsi_rbuf_get(cmd, &rbuf);
memset(rbuf, 0, buflen);
rc = actor(args, rbuf, buflen);
ata_scsi_rbuf_put(cmd, rbuf);
local_irq_restore(flags);
if (rc == 0)
cmd->result = SAM_STAT_GOOD;
args->done(cmd);
@ -2473,6 +2478,9 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
u8 *buf = NULL;
unsigned int buflen;
unsigned long flags;
local_irq_save(flags);
buflen = ata_scsi_rbuf_get(cmd, &buf);
@ -2490,6 +2498,8 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
}
ata_scsi_rbuf_put(cmd, buf);
local_irq_restore(flags);
}
cmd->result = SAM_STAT_GOOD;