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i2c: Avoid undefined right shift operation

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This commit is contained in:
Sebastian Huber
2014-11-26 08:24:39 +01:00
parent 39af57c3f7
commit d6f0ca64a5
1 changed files with 8 additions and 5 deletions
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13
cpukit/dev/i2c/eeprom.c
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@@ -221,17 +221,20 @@ int i2c_dev_register_eeprom(
if (address_bytes > EEPROM_MAX_ADDRESS_BYTES) { if (address_bytes > EEPROM_MAX_ADDRESS_BYTES) {
rtems_set_errno_and_return_minus_one(ERANGE); rtems_set_errno_and_return_minus_one(ERANGE);
} else if (address_bytes == EEPROM_MAX_ADDRESS_BYTES) {
extra_address = 0;
} else {
extra_address = size_in_bytes >> (8 * address_bytes);
}
if (extra_address != 0 && (extra_address & (extra_address - 1)) != 0) {
rtems_set_errno_and_return_minus_one(EINVAL);
} }
if (page_size_in_bytes > EEPROM_MAX_PAGE_SIZE) { if (page_size_in_bytes > EEPROM_MAX_PAGE_SIZE) {
page_size_in_bytes = EEPROM_MAX_PAGE_SIZE; page_size_in_bytes = EEPROM_MAX_PAGE_SIZE;
} }
extra_address = size_in_bytes >> (8 * address_bytes);
if (extra_address != 0 && (extra_address & (extra_address - 1)) != 0) {
rtems_set_errno_and_return_minus_one(EINVAL);
}
if (program_timeout_in_ms == 0) { if (program_timeout_in_ms == 0) {
program_timeout_in_ms = 1000; program_timeout_in_ms = 1000;
} }