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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-06-22 17:05:35 -0500
committerBorislav Petkov <bp@suse.de>2017-06-23 09:48:50 +0200
commitee514c7a2379385fcec363f2f5f8db4eb56bc48c (patch)
tree5a36ac3d8368dab11f80b94ab63863b86fdc84d7 /drivers/edac
parentff0abed4922ffbd40dc4e5a78b8ea56a5eb68ec7 (diff)
EDAC, pnd2: Return proper error value from apl_rd_reg()
Add code comment to make it clear that the fall-through is intentional and, OR ret with its previous value to avoid overwriting it so that callers can check the correct return value. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20170622220535.GA4896@embeddedgus [ Massage a bit. ] Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/pnd2_edac.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 1cad5a9af8d0..e1748d7e5190 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -168,14 +168,15 @@ int sbi_send(int port, int off, int op, u32 *data)
static int apl_rd_reg(int port, int off, int op, void *data, size_t sz, char *name)
{
- int ret = 0;
+ int ret = 0;
edac_dbg(2, "Read %s port=%x off=%x op=%x\n", name, port, off, op);
switch (sz) {
case 8:
ret = sbi_send(port, off + 4, op, (u32 *)(data + 4));
+ /* fall through */
case 4:
- ret = sbi_send(port, off, op, (u32 *)data);
+ ret |= sbi_send(port, off, op, (u32 *)data);
pnd2_printk(KERN_DEBUG, "%s=%x%08x ret=%d\n", name,
sz == 8 ? *((u32 *)(data + 4)) : 0, *((u32 *)data), ret);
break;

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