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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-11-17 23:05:23 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2021-12-10 15:55:41 +0100 |
| commit | 3f43926f271287fb1744c9ac9ae1122497f2b0c2 (patch) | |
| tree | daaaee0025dfe52791ef022df5f5ac829e6d0c18 /drivers/i3c | |
| parent | i3c: fix incorrect address slot lookup on 64-bit (diff) | |
| download | linux-3f43926f271287fb1744c9ac9ae1122497f2b0c2.tar.xz linux-3f43926f271287fb1744c9ac9ae1122497f2b0c2.zip | |
i3c/master/mipi-i3c-hci: Fix a potentially infinite loop in 'hci_dat_v1_get_index()'
The code in 'hci_dat_v1_get_index()' really looks like a hand coded version
of 'for_each_set_bit()', except that a +1 is missing when searching for the
next set bit.
This really looks odd and it seems that it will loop until 'dat_w0_read()'
returns the expected result.
So use 'for_each_set_bit()' instead. It is less verbose and should be more
correct.
Fixes: 9ad9a52cce28 ("i3c/master: introduce the mipi-i3c-hci driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Nicolas Pitre <npitre@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/0cdf3cb10293ead1acd271fdb8a70369c298c082.1637186628.git.christophe.jaillet@wanadoo.fr
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master/mipi-i3c-hci/dat_v1.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/i3c/master/mipi-i3c-hci/dat_v1.c b/drivers/i3c/master/mipi-i3c-hci/dat_v1.c index 783e551a2c85..97bb49ff5b53 100644 --- a/drivers/i3c/master/mipi-i3c-hci/dat_v1.c +++ b/drivers/i3c/master/mipi-i3c-hci/dat_v1.c @@ -160,9 +160,7 @@ static int hci_dat_v1_get_index(struct i3c_hci *hci, u8 dev_addr) unsigned int dat_idx; u32 dat_w0; - for (dat_idx = find_first_bit(hci->DAT_data, hci->DAT_entries); - dat_idx < hci->DAT_entries; - dat_idx = find_next_bit(hci->DAT_data, hci->DAT_entries, dat_idx)) { + for_each_set_bit(dat_idx, hci->DAT_data, hci->DAT_entries) { dat_w0 = dat_w0_read(dat_idx); if (FIELD_GET(DAT_0_DYNAMIC_ADDRESS, dat_w0) == dev_addr) return dat_idx; |