patch "ics932s401: fix broken handling of errors when word reading fails" added to char-misc-linus

This is a note to let you know that I've just added the patch titled

ics932s401: fix broken handling of errors when word reading fails

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From a73b6a3b4109ce2ed01dbc51a6c1551a6431b53c Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <[email protected]>
Date: Wed, 28 Apr 2021 15:25:34 -0700
Subject: ics932s401: fix broken handling of errors when word reading fails

In commit b05ae01fdb89, someone tried to make the driver handle i2c read errors by simply zeroing out the register contents, but for some reason left unaltered the code that sets the cached register value the function call return value.

The original patch was authored by a member of the Underhanded Mangle-happy Nerds, I'm not terribly surprised. I don't have the hardware anymore so I can't test this, but it seems like a pretty obvious API usage fix to me...

---
 drivers/misc/ics932s401.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 2bdf560ee681..0f9ea75b0b18 100644
@@ -134,7 +134,7 @@ static struct ics932s401_data *ics932s401_update_device(struct device *dev)
 	for (i = 0; i < NUM_MIRRORED_REGS; i++) {
 		temp = i2c_smbus_read_word_data(client, regs_to_copy[i]);
 		if (temp < 0)
-			data->regs[regs_to_copy[i]] = 0;
+			temp = 0;
 		data->regs[regs_to_copy[i]] = temp >> 8;
 	}
 

2.31.1