linux-kernel - [PATCH] powerpc/ps3: use dma_mapping

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Message-Id: <20201213182622.23047-1-vincent.stehle@laposte.net>
Date:   Sun, 13 Dec 2020 19:26:22 +0100
From:   Vincent Stehlé <vincent.stehle@...oste.net>
To:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Vincent Stehlé <vincent.stehle@...oste.net>,
        Geoff Levand <geoff@...radead.org>,
        Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
Subject: [PATCH] powerpc/ps3: use dma_mapping_error()

The DMA address returned by dma_map_single() should be checked with
dma_mapping_error(). Fix the ps3stor_setup() function accordingly.

Fixes: 80071802cb9c ("[POWERPC] PS3: Storage Driver Core")
Signed-off-by: Vincent Stehlé <vincent.stehle@...oste.net>
Cc: Geoff Levand <geoff@...radead.org>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
---
 drivers/ps3/ps3stor_lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ps3/ps3stor_lib.c b/drivers/ps3/ps3stor_lib.c
index 333ba83006e48..a12a1ad9b5fe3 100644
--- a/drivers/ps3/ps3stor_lib.c
+++ b/drivers/ps3/ps3stor_lib.c
@@ -189,7 +189,7 @@ int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler)
 	dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf));
 	dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf,
 					 dev->bounce_size, DMA_BIDIRECTIONAL);
-	if (!dev->bounce_dma) {
+	if (dma_mapping_error(&dev->sbd.core, dev->bounce_dma)) {
 		dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n",
 			__func__, __LINE__);
 		error = -ENODEV;
-- 
2.29.2