serial: pic32: free up irq names correctly

struct pic32_sport contains built-up names for irqs. These are freed
only in error path of pic32_uart_startup(). And even there, the freeing
happens before free_irq().

So fix this by:
* moving frees after free_irq(), and
* add frees to pic32_uart_shutdown() -- the opposite of
  pic32_uart_startup().

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220503063122.20957-11-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index 990603fe8a8d4232578dc24f60e45b36200c8246..c5584628f8c44820eeb230d5ebe6f23966bd8f88 100644 (file)
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -569,14 +569,14 @@ static int pic32_uart_startup(struct uart_port *port)
        return 0;
 
 out_t:
-       kfree(sport->irq_tx_name);
        free_irq(sport->irq_tx, port);
+       kfree(sport->irq_tx_name);
 out_r:
-       kfree(sport->irq_rx_name);
        free_irq(sport->irq_rx, port);
+       kfree(sport->irq_rx_name);
 out_f:
-       kfree(sport->irq_fault_name);
        free_irq(sport->irq_fault, port);
+       kfree(sport->irq_fault_name);
 out_done:
        return ret;
 }
@@ -595,8 +595,11 @@ static void pic32_uart_shutdown(struct uart_port *port)
 
        /* free all 3 interrupts for this UART */
        free_irq(sport->irq_fault, port);
+       kfree(sport->irq_fault_name);
        free_irq(sport->irq_tx, port);
+       kfree(sport->irq_tx_name);
        free_irq(sport->irq_rx, port);
+       kfree(sport->irq_rx_name);
 }
 
 /* serial core request to change current uart setting */