From: Cédric Le Goater clg@kaod.org
[ Upstream commit a74ce5926b20cd0e6d624a9b2527073a96dfed7f ]
When looping on IRQ descriptor, irq_data is always valid.
Fixes: 930914b7d528 ("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 --- arch/powerpc/sysdev/xive/common.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 595310e056f4..6e43bba80707 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -1599,6 +1599,8 @@ 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; @@ -1612,17 +1614,14 @@ 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"); }