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pinctrl: single: Add allocation failure checking of saved_vals

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Currently saved_vals is being allocated and there is no check for
failed allocation (which is more likely than normal when using
GFP_ATOMIC).  Fix this by checking for a failed allocation and
propagating this error return down the the caller chain.

Detected by CoverityScan, CID#1469841 ("Dereference null return value")
Fixes: 88a1dbdec6 ("pinctrl: pinctrl-single: Add functions to save and restore pinctrl context")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Colin Ian King 2018-06-06 14:43:38 +01:00 committed by Linus Walleij
parent bc3322bc16
commit 7f57871f39
1 changed files with 11 additions and 3 deletions
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14
drivers/pinctrl/pinctrl-single.c
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@ -1590,8 +1590,11 @@ static int pcs_save_context(struct pcs_device *pcs)
mux_bytes = pcs->width / BITS_PER_BYTE;
if (!pcs->saved_vals)
if (!pcs->saved_vals) {
pcs->saved_vals = devm_kzalloc(pcs->dev, pcs->size, GFP_ATOMIC);
if (!pcs->saved_vals)
return -ENOMEM;
}
switch (pcs->width) {
case 64:
@ -1651,8 +1654,13 @@ static int pinctrl_single_suspend(struct platform_device *pdev,
if (!pcs)
return -EINVAL;
if (pcs->flags & PCS_CONTEXT_LOSS_OFF)
pcs_save_context(pcs);
if (pcs->flags & PCS_CONTEXT_LOSS_OFF) {
int ret;
ret = pcs_save_context(pcs);
if (ret < 0)
return ret;
}
return pinctrl_force_sleep(pcs->pctl);
}