linux-kernel - [patch] TPM: handle errors from probe

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Date:	Tue, 3 Jan 2012 16:17:48 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Debora Velarde <debora@...ux.vnet.ibm.com>
Cc:	Rajiv Andrade <srajiv@...ux.vnet.ibm.com>,
	Marcel Selhorst <m.selhorst@...rix.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] TPM: handle errors from probe_itpm()

We recently made itpm a bool in linux-next and it broke the error
handling here.  This patch also preserves the return codes from
probe_itpm() instead of always returning -ENODEV.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index a174862..08c6a07 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -538,11 +538,11 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
 		 vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
 
 	if (!itpm) {
-		itpm = probe_itpm(chip);
-		if (itpm < 0) {
-			rc = -ENODEV;
+		rc = probe_itpm(chip);
+		if (rc < 0)
 			goto out_err;
-		}
+		itpm = rc;
+		rc = 0;
 	}
 
 	if (itpm)
--
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