linux-kernel - [PATCH] thinkpad_acpi: Fix build error when CONFIG_SND_MAX

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Date:	Thu, 24 Oct 2013 16:06:32 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Henrique de Moraes Holschuh <ibm-acpi@....eng.br>
Cc:	Matthew Garrett <matthew.garrett@...ula.com>,
	ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] thinkpad_acpi: Fix build error when CONFIG_SND_MAX_CARDS > 32

SNDRV_CARDS can be specified via Kconfig since 3.11 kernel, so this
can be over 32bit integer range, which leads to a build error.

Cc: <stable@...r.kernel.org> [v3.11+]
Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
 drivers/platform/x86/thinkpad_acpi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 0b7efb2..79f77a7 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6421,7 +6421,12 @@ static struct ibm_struct brightness_driver_data = {
 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
 
-static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
+#if SNDRV_CARDS <= 32
+#define DEFAULT_ALSA_IDX		~((1 << (SNDRV_CARDS - 3)) - 1)
+#else
+#define DEFAULT_ALSA_IDX		~((1 << (32 - 3)) - 1)
+#endif
+static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
 static char *alsa_id = "ThinkPadEC";
 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
 
-- 
1.8.4

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