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Message-ID: <20240801002803.3935985-61-sashal@kernel.org>
Date: Wed, 31 Jul 2024 20:26:19 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Sasha Levin <sashal@...nel.org>,
gustavoars@...nel.org,
kees@...nel.org,
linux-i3c@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.1 61/61] i3c: mipi-i3c-hci: Error out instead on BUG_ON() in IBI DMA setup
From: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
[ Upstream commit 8a2be2f1db268ec735419e53ef04ca039fc027dc ]
Definitely condition dma_get_cache_alignment * defined value > 256
during driver initialization is not reason to BUG_ON(). Turn that to
graceful error out with -EINVAL.
Signed-off-by: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Link: https://lore.kernel.org/r/20240628131559.502822-3-jarkko.nikula@linux.intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/i3c/master/mipi-i3c-hci/dma.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c
index 71b5dbe45c45c..a4b56d59a5a13 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dma.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
@@ -291,7 +291,10 @@ static int hci_dma_init(struct i3c_hci *hci)
rh->ibi_chunk_sz = dma_get_cache_alignment();
rh->ibi_chunk_sz *= IBI_CHUNK_CACHELINES;
- BUG_ON(rh->ibi_chunk_sz > 256);
+ if (rh->ibi_chunk_sz > 256) {
+ ret = -EINVAL;
+ goto err_out;
+ }
ibi_status_ring_sz = rh->ibi_status_sz * rh->ibi_status_entries;
ibi_data_ring_sz = rh->ibi_chunk_sz * rh->ibi_chunks_total;
--
2.43.0
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