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SubjectRe: [PATCH] i2c: imx: Remove a useless test in 'i2c_imx_init_recovery_info()'


On Mon, 7 Aug 2017, Uwe Kleine-König wrote:

> On Mon, Aug 07, 2017 at 01:49:53AM +0200, Christophe JAILLET wrote:
> > 'devm_pinctrl_get()' never returns NULL, so this test can be simplified.
>
> That's wrong. If CONFIG_PINCTRL is disabled devm_pinctrl_get returns
> NULL. But I think this shouldn't be considered an error, so your change
> is right, just the commit log is not.
>
> > diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> > index 54a47b40546f..7e84662fe1c0 100644
> > --- a/drivers/i2c/busses/i2c-imx.c
> > +++ b/drivers/i2c/busses/i2c-imx.c
> > @@ -997,7 +997,7 @@ static int i2c_imx_init_recovery_info(struct imx_i2c_struct *i2c_imx,
> > struct i2c_bus_recovery_info *rinfo = &i2c_imx->rinfo;
> >
> > i2c_imx->pinctrl = devm_pinctrl_get(&pdev->dev);
> > - if (!i2c_imx->pinctrl || IS_ERR(i2c_imx->pinctrl)) {
> > + if (IS_ERR(i2c_imx->pinctrl)) {
> > dev_info(&pdev->dev, "can't get pinctrl, bus recovery not supported\n");
> > return PTR_ERR(i2c_imx->pinctrl);
> > }
>
> Side note: I'm not sure, this construct is valid. IIRC PTR_ERR should
> only be called for values x where IS_ERR(x) is true. Here it is at least
> surprising that an message hints to a problem but the return code is 0.
>
> @Julia: I'm sure coccinelle can find more of those?!

I only found a few. Christophe, if you want to fix tem up, please go
ahead.

julia

diff -u -p /var/linuxes/linux-next/drivers/net/ethernet/intel/e100.c
/tmp/nothing/drivers/net/ethernet/intel/e100.c
--- /var/linuxes/linux-next/drivers/net/ethernet/intel/e100.c
+++ /tmp/nothing/drivers/net/ethernet/intel/e100.c
@@ -1370,8 +1370,6 @@ static inline int e100_load_ucode_wait(s

fw = e100_request_firmware(nic);
/* If it's NULL, then no ucode is required */
- if (!fw || IS_ERR(fw))
- return PTR_ERR(fw);

if ((err = e100_exec_cb(nic, (void *)fw, e100_setup_ucode)))
netif_err(nic, probe, nic->netdev,
diff -u -p /var/linuxes/linux-next/drivers/i2c/busses/i2c-imx.c
/tmp/nothing/drivers/i2c/busses/i2c-imx.c
--- /var/linuxes/linux-next/drivers/i2c/busses/i2c-imx.c
+++ /tmp/nothing/drivers/i2c/busses/i2c-imx.c
@@ -997,9 +997,7 @@ static int i2c_imx_init_recovery_info(st
struct i2c_bus_recovery_info *rinfo = &i2c_imx->rinfo;

i2c_imx->pinctrl = devm_pinctrl_get(&pdev->dev);
- if (!i2c_imx->pinctrl || IS_ERR(i2c_imx->pinctrl)) {
dev_info(&pdev->dev, "can't get pinctrl, bus recovery not
supported\n");
- return PTR_ERR(i2c_imx->pinctrl);
}

i2c_imx->pinctrl_pins_default =
pinctrl_lookup_state(i2c_imx->pinctrl,
diff -u -p /var/linuxes/linux-next/drivers/crypto/chelsio/chcr_algo.c
/tmp/nothing/drivers/crypto/chelsio/chcr_algo.c
--- /var/linuxes/linux-next/drivers/crypto/chelsio/chcr_algo.c
+++ /tmp/nothing/drivers/crypto/chelsio/chcr_algo.c
@@ -3159,8 +3159,6 @@ static int chcr_aead_op(struct aead_requ
skb = create_wr_fn(req, u_ctx->lldi.rxq_ids[ctx->rx_qidx], size,
op_type);

- if (IS_ERR(skb) || !skb)
- return PTR_ERR(skb);

skb->dev = u_ctx->lldi.ports[0];
set_wr_txq(skb, CPL_PRIORITY_DATA, ctx->tx_qidx);
diff -u -p /var/linuxes/linux-next/fs/ocfs2/acl.c
/tmp/nothing/fs/ocfs2/acl.c
--- /var/linuxes/linux-next/fs/ocfs2/acl.c
+++ /tmp/nothing/fs/ocfs2/acl.c
@@ -331,8 +331,6 @@ int ocfs2_acl_chmod(struct inode *inode,
return 0;

acl = ocfs2_get_acl_nolock(inode, ACL_TYPE_ACCESS, bh);
- if (IS_ERR(acl) || !acl)
- return PTR_ERR(acl);
ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
if (ret)
return ret;




>
> Best regards
> Uwe
>
> --
> Pengutronix e.K. | Uwe Kleine-König |
> Industrial Linux Solutions | http://www.pengutronix.de/ |
> --
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