[PATCH 3/4] i3c: mipi-i3c-hci: Error out instead on BUG_ON() in IBI DMA setup
Jarkko Nikula
jarkko.nikula at linux.intel.com
Fri Jun 28 06:15:58 PDT 2024
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 at linux.intel.com>
---
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 7a56ae4a5ddf..9bdfe40bc1e1 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dma.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
@@ -279,7 +279,10 @@ 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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