linux-kernel - [PATCH] ACPI, PCI, irq: remove redundant check for null string pointer

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Date:	Tue,  5 Jan 2016 10:57:11 +0000
From:	Colin King <colin.king@...onical.com>
To:	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>, linux-acpi@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] ACPI, PCI, irq: remove redundant check for null string pointer

From: Colin Ian King <colin.king@...onical.com>

source is decleared as a 4 byte char array in struct acpi_pci_routing_table
so !prt->source is a redundant null string pointer check. Detected with
smatch:

drivers/acpi/pci_irq.c:134 do_prt_fixups() warn: this array is probably
  non-NULL. 'prt->source'

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/acpi/pci_irq.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index c933675..d30184c 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -131,9 +131,6 @@ static void do_prt_fixups(struct acpi_prt_entry *entry,
 		quirk = &prt_quirks[i];
 
 		/* All current quirks involve link devices, not GSIs */
-		if (!prt->source)
-			continue;
-
 		if (dmi_check_system(quirk->system) &&
 		    entry->id.segment == quirk->segment &&
 		    entry->id.bus == quirk->bus &&
-- 
2.6.4

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