soc: qcom: mdt_loader: Fix error return values in mdt_header_valid()

commit 9f35ab0 upstream.

This function is supposed to return true for valid headers and false for
invalid.  In a couple places it returns -EINVAL instead which means the
invalid headers are counted as true.  Change it to return false.

Fixes: 9f9967f ("soc: qcom: mdt_loader: Ensure we don't read past the ELF header")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/db57c01c-bdcc-4a0f-95db-b0f2784ea91f@sabinyo.mountain
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Dan Carpenter

drivers/soc/qcom/mdt_loader.c

@@ -33,14 +33,14 @@ static bool mdt_header_valid(const struct firmware *fw)
 		return false;
 
 	if (ehdr->e_phentsize != sizeof(struct elf32_phdr))
-		return -EINVAL;
+		return false;
 
 	phend = size_add(size_mul(sizeof(struct elf32_phdr), ehdr->e_phnum), ehdr->e_phoff);
 	if (phend > fw->size)
 		return false;
 
 	if (ehdr->e_shentsize != sizeof(struct elf32_shdr))
-		return -EINVAL;
+		return false;
 
 	shend = size_add(size_mul(sizeof(struct elf32_shdr), ehdr->e_shnum), ehdr->e_shoff);
 	if (shend > fw->size)