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usb: musb: dsps: fix devm_ioremap_resource error detection code 

devm_ioremap_resource returns an ERR_PTR value, not NULL, on failure.
Furthermore, the value returned by devm_ioremap_resource should be tested.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e,e1;
statement S;
@@

*e = devm_ioremap_resource(...);
if (!e1) S

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Julia Lawall 2013-08-19 18:00:08 +02:00 committed by Felipe Balbi
parent 272b05a988
commit 51ef74f640
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/musb/musb_dsps.c
View File

@ -361,8 +361,8 @@ static int dsps_musb_init(struct musb *musb)
return -EINVAL;
reg_base = devm_ioremap_resource(dev, r);
if (!musb->ctrl_base)
return -EINVAL;
if (IS_ERR(reg_base))
return PTR_ERR(reg_base);
musb->ctrl_base = reg_base;
/* NOP driver needs change if supporting dual instance */