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linux-dey-6.6: stm32mp-rt-r2: fix stm32-usart context after DMA revert 

Kernel commit b6ae6fee73eab568ba49a4a489fdac6bb5027997 removed the
RTO-based flush logic in stm32-usart.

As a result, the RT patch no longer applies cleanly because it
modifies the receive_chars() call using the old context.

Update the RT patch to match the new baseline while preserving
the PREEMPT_RT locking changes.

https://onedigi.atlassian.net/browse/DEL-10000

Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>
This commit is contained in:
Isaac Hermida 2026-03-02 12:54:00 +01:00
parent fd54946eb0
commit 41ab14adb8
1 changed files with 1 additions and 1 deletions
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2
meta-digi-arm/recipes-kernel/linux/linux-dey/stm32mpcommon/0011-v6.6-stm32mp-rt-r2.patch
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@ -442,7 +442,7 @@ index 1c949774f..b56d3b77c 100644
if (stm32_usart_rx_dma_started(stm32_port) && !stm32_port->throttled) { if (stm32_usart_rx_dma_started(stm32_port) && !stm32_port->throttled) {
- spin_lock(&port->lock); - spin_lock(&port->lock);
+ uart_port_lock(port); + uart_port_lock(port);
size = stm32_usart_receive_chars(port, (sr & USART_SR_RTOF)); size = stm32_usart_receive_chars(port, false);
uart_unlock_and_check_sysrq(port); uart_unlock_and_check_sysrq(port);
if (size) if (size)
@@ -1319,7 +1309,7 @@ static void stm32_usart_unthrottle(struct uart_port *port) @@ -1319,7 +1309,7 @@ static void stm32_usart_unthrottle(struct uart_port *port)