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serial: sc16is7xx: improve do/while loop in sc16is7xx_irq()

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commit d5078509c8b06c5c472a60232815e41af81c6446 upstream.

Simplify and improve readability by replacing while(1) loop with
do {} while, and by using the keep_polling variable as the exit
condition, making it more explicit.

Fixes: 8344498721 ("sc16is7xx: Fix for multi-channel stall")
Cc:  <stable@vger.kernel.org>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20231221231823.2327894-6-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hugo Villeneuve 2023-12-21 18:18:12 -05:00 committed by Greg Kroah-Hartman
parent 80beb4424d
commit 0e0653d53a
1 changed files with 6 additions and 5 deletions
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11
drivers/tty/serial/sc16is7xx.c
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@ -784,17 +784,18 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno)
static irqreturn_t sc16is7xx_irq(int irq, void *dev_id)
{
bool keep_polling;
struct sc16is7xx_port *s = (struct sc16is7xx_port *)dev_id;
while (1) {
bool keep_polling = false;
do {
int i;
keep_polling = false;
for (i = 0; i < s->devtype->nr_uart; ++i)
keep_polling |= sc16is7xx_port_irq(s, i);
if (!keep_polling)
break;
}
} while (keep_polling);
return IRQ_HANDLED;
}