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powerpc/xive: Drop check on irq_data in xive_core_debug_show()

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[ Upstream commit a74ce5926b20cd0e6d624a9b2527073a96dfed7f ]

When looping on IRQ descriptor, irq_data is always valid.

Fixes: 930914b7d5 ("powerpc/xive: Add a debugfs file to dump internal XIVE state")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210331144514.892250-6-clg@kaod.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Cédric Le Goater
2021-03-31 16:45:10 +02:00
committed by Greg Kroah-Hartman
parent a38b77899c
commit e2724bed64
1 changed files with 10 additions and 11 deletions
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21
arch/powerpc/sysdev/xive/common.c
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@@ -1606,6 +1606,8 @@ static void xive_debug_show_irq(struct seq_file *m, u32 hw_irq, struct irq_data
u32 target;
u8 prio;
u32 lirq;
struct xive_irq_data *xd;
u64 val;
if (!is_xive_irq(chip))
return;
@@ -1619,17 +1621,14 @@ static void xive_debug_show_irq(struct seq_file *m, u32 hw_irq, struct irq_data
seq_printf(m, "IRQ 0x%08x : target=0x%x prio=%02x lirq=0x%x ",
hw_irq, target, prio, lirq);
if (d) {
struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
u64 val = xive_esb_read(xd, XIVE_ESB_GET);
seq_printf(m, "flags=%c%c%c PQ=%c%c",
xd->flags & XIVE_IRQ_FLAG_STORE_EOI ? 'S' : ' ',
xd->flags & XIVE_IRQ_FLAG_LSI ? 'L' : ' ',
xd->flags & XIVE_IRQ_FLAG_H_INT_ESB ? 'H' : ' ',
val & XIVE_ESB_VAL_P ? 'P' : '-',
val & XIVE_ESB_VAL_Q ? 'Q' : '-');
}
xd = irq_data_get_irq_handler_data(d);
val = xive_esb_read(xd, XIVE_ESB_GET);
seq_printf(m, "flags=%c%c%c PQ=%c%c",
xd->flags & XIVE_IRQ_FLAG_STORE_EOI ? 'S' : ' ',
xd->flags & XIVE_IRQ_FLAG_LSI ? 'L' : ' ',
xd->flags & XIVE_IRQ_FLAG_H_INT_ESB ? 'H' : ' ',
val & XIVE_ESB_VAL_P ? 'P' : '-',
val & XIVE_ESB_VAL_Q ? 'Q' : '-');
seq_puts(m, "\n");
}