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EDAC, pnd2: Return proper error value from apl_rd_reg()

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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>
This commit is contained in:
Gustavo A. R. Silva 2017-06-22 17:05:35 -05:00 committed by Borislav Petkov
parent ff0abed492
commit ee514c7a23
1 changed files with 3 additions and 2 deletions
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5
drivers/edac/pnd2_edac.c
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@ -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;