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fpga: machxo2-spi: Return an error on failure

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[ Upstream commit 34331739e19fd6a293d488add28832ad49c9fc54 ]

Earlier successes leave 'ret' in a non error state, so these errors are
not reported. Set ret to -EINVAL before going to the error handler.

This addresses two issues reported by smatch:
drivers/fpga/machxo2-spi.c:229 machxo2_write_init()
  warn: missing error code 'ret'

drivers/fpga/machxo2-spi.c:316 machxo2_write_complete()
  warn: missing error code 'ret'

[mdf@kernel.org: Reworded commit message]
Fixes: 88fb3a0023 ("fpga: lattice machxo2: Add Lattice MachXO2 support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tom Rix 2021-08-10 09:40:36 -07:00 committed by Greg Kroah-Hartman
parent 5bcead7cde
commit 0ebc3e688f
1 changed files with 4 additions and 1 deletions
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5
drivers/fpga/machxo2-spi.c
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@ -223,8 +223,10 @@ static int machxo2_write_init(struct fpga_manager *mgr,
goto fail;
get_status(spi, &status);
if (test_bit(FAIL, &status))
if (test_bit(FAIL, &status)) {
ret = -EINVAL;
goto fail;
}
dump_status_reg(&status);
spi_message_init(&msg);
@ -310,6 +312,7 @@ static int machxo2_write_complete(struct fpga_manager *mgr,
dump_status_reg(&status);
if (!test_bit(DONE, &status)) {
machxo2_cleanup(mgr);
ret = -EINVAL;
goto fail;
}