5.4-stable review patch. If anyone has any objections, please let me know.
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From: Chunyan Zhang chunyan.zhang@unisoc.com
[ Upstream commit cd119fdc3ee1450fbf7f78862b5de44c42b6e47f ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/tty/serial/sprd_serial.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c index 18f5a7f438329..8b45b3ab63416 100644 --- a/drivers/tty/serial/sprd_serial.c +++ b/drivers/tty/serial/sprd_serial.c @@ -371,7 +371,7 @@ 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) @@ -1199,7 +1199,7 @@ 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; } }
@@ -1218,6 +1218,7 @@ static int sprd_probe(struct platform_device *pdev) 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; }