RE: [PATCH tty] 8250: microchip: pci1xxxx: Fix hardware flow control failure

[Kumaravel.Thiagarajan]

> -----Original Message-----
> From: Lavanya N <Lavanya.Nehru@xxxxxxxxxxxxx>
> Sent: Tuesday, March 3, 2026 4:32 PM
> To: jirislaby@xxxxxxxxxx
> Cc: gregkh@xxxxxxxxxxxxxxxxxxx; Kumaravel Thiagarajan - I21417
> <Kumaravel.Thiagarajan@xxxxxxxxxxxxx>; rengarajan.s@xxxxxxxxxxxxx;
> linux-serial@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; UNGLinuxDriver
> <UNGLinuxDriver@xxxxxxxxxxxxx>; Lavanya Nehru - I74215
> <Lavanya.Nehru@xxxxxxxxxxxxx>
> Subject: [PATCH tty] 8250: microchip: pci1xxxx: Fix hardware flow control
> failure
> 
> Fix the interrupt handler in the pci1xxxx UART driver by adding the missing
> serial8250_modem_status() call.
> 
> Without this call, modem status interrupts (CTS, DSR, RI, DCD) are not
> processed, which breaks hardware flow control.
> 
> Fixes: aba8290f368d ("8250: microchip: pci1xxxx: Add Burst mode reception
> support in uart driver for writing into FIFO")
> Signed-off-by: Lavanya N <Lavanya.Nehru@xxxxxxxxxxxxx>

Reviewed-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@xxxxxxxxxxxxx>