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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-07-26 10:05:13 -0400
committerJeff Garzik <jgarzik@redhat.com>2009-07-28 21:06:13 -0400
commitc9abde12d6debe5b97f36fb43cf188c1b9cd477f (patch)
tree0bd6a455f9b21ade1cc5dc4a2eaab29a670ec175
parent705d201414382b0966d7c903d738dfdb9380e4af (diff)
libata: remove superfluous NULL pointer checks
host->ports[] always contain pointers to valid port structures since a "dummy port" structure is used in case if there is no physical port. This patch takes care of two entries from Dan's list: drivers/ata/sata_sil.c +535 sil_interrupt(13) warning: variable derefenced before check 'ap' drivers/ata/sata_mv.c +2517 mv_unexpected_intr(6) warning: variable derefenced before check 'ap' and of another needless NULL pointer check in pata_octeon_cf.c. Reported-by: Dan Carpenter <error27@gmail.com> Cc: corbet@lwn.net Cc: eteo@redhat.com Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
-rw-r--r--drivers/ata/pata_octeon_cf.c3
-rw-r--r--drivers/ata/sata_mv.c2
-rw-r--r--drivers/ata/sata_sil.c2
3 files changed, 4 insertions, 3 deletions
diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index 8d9343accf3c..abdd19fe990a 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -653,7 +653,8 @@ static irqreturn_t octeon_cf_interrupt(int irq, void *dev_instance)
653 653
654 ap = host->ports[i]; 654 ap = host->ports[i];
655 ocd = ap->dev->platform_data; 655 ocd = ap->dev->platform_data;
656 if (!ap || (ap->flags & ATA_FLAG_DISABLED)) 656
657 if (ap->flags & ATA_FLAG_DISABLED)
657 continue; 658 continue;
658 659
659 ocd = ap->dev->platform_data; 660 ocd = ap->dev->platform_data;
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 23714aefb825..c19417e02208 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2514,7 +2514,7 @@ static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
2514 char *when = "idle"; 2514 char *when = "idle";
2515 2515
2516 ata_ehi_clear_desc(ehi); 2516 ata_ehi_clear_desc(ehi);
2517 if (!ap || (ap->flags & ATA_FLAG_DISABLED)) { 2517 if (ap->flags & ATA_FLAG_DISABLED) {
2518 when = "disabled"; 2518 when = "disabled";
2519 } else if (edma_was_enabled) { 2519 } else if (edma_was_enabled) {
2520 when = "EDMA enabled"; 2520 when = "EDMA enabled";
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 030ec079b184..35bd5cc7f285 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -532,7 +532,7 @@ static irqreturn_t sil_interrupt(int irq, void *dev_instance)
532 struct ata_port *ap = host->ports[i]; 532 struct ata_port *ap = host->ports[i];
533 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2); 533 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
534 534
535 if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED)) 535 if (unlikely(ap->flags & ATA_FLAG_DISABLED))
536 continue; 536 continue;
537 537
538 /* turn off SATA_IRQ if not supported */ 538 /* turn off SATA_IRQ if not supported */