Thread (12 messages) 12 messages, 5 authors, 2015-09-14

Re: [PATCH] ahci: qoriq: fixed using uninitialized variable warnings

From: Hans de Goede <hidden>
Date: 2015-09-09 10:57:25
Also in: linux-ide, lkml

Hi,

On 09-09-15 11:16, Yuantian.Tang@freescale.com wrote:
From: Tang Yuantian <redacted>

kbuild test robot reports the warnings:
drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
quoted
quoted
include/asm-generic/io.h:163:2: warning: 'px_is' may be used
uninitialized in this function [-Wuninitialized]
drivers/ata/ahci_qoriq.c:70:14: note: 'px_is' was declared here
quoted
quoted
include/asm-generic/io.h:163:2: warning: 'px_cmd' may be used
uninitialized in this function [-Wuninitialized]
drivers/ata/ahci_qoriq.c:70:6: note: 'px_cmd' was declared here

This patch fixed it by assigning 0 to px_is and px_cmd variables.
This patch also remove line 'struct ccsr_ahci *reg_base' which is
not referred by any other codes and thus a dead one.

Signed-off-by: Tang Yuantian <redacted>
LGTM: Acked-by: Hans de Goede [off-list ref]

Regards,

Hans

quoted hunk ↗ jump to hunk
---
  drivers/ata/ahci_qoriq.c | 3 +--
  1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index e5e4988..f790852 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -49,7 +49,6 @@ enum ahci_qoriq_type {
  };

  struct ahci_qoriq_priv {
-	struct ccsr_ahci *reg_base;
  	enum ahci_qoriq_type type;
  	void __iomem *ecc_addr;
  };
@@ -67,7 +66,7 @@ static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class,
  {
  	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
  	void __iomem *port_mmio = ahci_port_base(link->ap);
-	u32 px_cmd, px_is, px_val;
+	u32 px_cmd = 0, px_is = 0, px_val;
  	struct ata_port *ap = link->ap;
  	struct ahci_port_priv *pp = ap->private_data;
  	struct ahci_host_priv *hpriv = ap->host->private_data;
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