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| author |   Chunyan Zhang <chunyan.zhang@unisoc.com> | 2023-07-25 14:40:53 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-30 13:53:55 +0200 |
| commit | cd119fdc3ee1450fbf7f78862b5de44c42b6e47f (patch) | |
| tree | 72af7085b847a0fadb2670fbafb7ef06c7c50d93 /drivers/tty/serial/sprd_serial.c | |
| parent | serial: sprd: Assign sprd_port after initialized to avoid wrong access (diff) | |
| download | wireguard-linux-cd119fdc3ee1450fbf7f78862b5de44c42b6e47f.tar.xz wireguard-linux-cd119fdc3ee1450fbf7f78862b5de44c42b6e47f.zip | |
serial: sprd: Fix DMA buffer leak issue
Release DMA buffer when _probe() returns failure to avoid memory leak.
Fixes: f4487db58eb7 ("serial: sprd: Add DMA mode support")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230725064053.235448-2-chunyan.zhang@unisoc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sprd_serial.c')
| -rw-r--r-- | drivers/tty/serial/sprd_serial.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c index efca715bc97e..f328fa57231f 100644 --- a/drivers/tty/serial/sprd_serial.c +++ b/drivers/tty/serial/sprd_serial.c @@ -364,7 +364,7 @@ static void sprd_rx_free_buf(struct sprd_uart_port *sp) if (sp->rx_dma.virt) dma_free_coherent(sp->port.dev, SPRD_UART_RX_SIZE, sp->rx_dma.virt, sp->rx_dma.phys_addr); - + sp->rx_dma.virt = NULL; } static int sprd_rx_dma_config(struct uart_port *port, u32 burst) @@ -1203,7 +1203,7 @@ static int sprd_probe(struct platform_device *pdev) ret = uart_register_driver(&sprd_uart_driver); if (ret < 0) { pr_err("Failed to register SPRD-UART driver\n"); - return ret; + goto free_rx_buf; } } @@ -1222,6 +1222,7 @@ clean_port: sprd_port[index] = NULL; if (--sprd_ports_num == 0) uart_unregister_driver(&sprd_uart_driver); +free_rx_buf: sprd_rx_free_buf(sport); return ret; } |